William Hinsberg, Joy Cheng, et al.
SPIE Advanced Lithography 2010
We demonstrate that phosphazene bases, such as 2-te/t-butylimino-2- diethylamino-1,3-dimethylperhydro-1,3,2-diazaphosphorine (BEMP) and N′-tert-butyl-N,N,N′N′,N″,N″- hexamethylphosphorimidic triamide (P1-t-Bu), are active organocatalysts for the living ring-opening polymerization (ROP) of cyclic esters. Polyesters prepared through this organocatalytic route possess predictable molecular weights, narrow polydispersities, and high end-group fidelity. Mechanistic studies suggest that the intermolecular hydrogen bonding of the alcohol initiator to phosphazene bases activates the alcohol for ROP of cyclic esters. © 2007 American Chemical Society.
William Hinsberg, Joy Cheng, et al.
SPIE Advanced Lithography 2010
R. Ghez, M.B. Small
JES
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
R.D. Murphy, R.O. Watts
Journal of Low Temperature Physics